These are miniature battle rules based upon the Castles & Crusades Siege Engine. With them in hand you can run small or large scale battles in any role playing game. This simple, straight-forward, and easy to use system easily simulates battles between hundreds and even thousands of combatants in a single gaming session. The Fields of Battle modification to the Siege Engine places the PCs and their arch enemies on the same battlefield right alongside the forces of combatants, allowing their skills and abilities to have a direct impact on the wars that they wage.